fix(frontend): Use relative URL for health endpoint

legalconsenthub/composables/useServerHealth.ts

@@ -4,7 +4,7 @@ export const lastCheckTime = ref<Date | null>(null)
 
 export function useServerHealth() {
   const checkInterval = ref<NodeJS.Timeout | null>(null)
-  const healthCheckUrl = 'http://localhost:3001/api/actuator/health'
+  const healthCheckUrl = '/api/actuator/health'
 
   async function checkServerHealth(): Promise<boolean> {
     if (isChecking.value) return isServerAvailable.value